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# This file is part of Chalk
#
# Copyright (c) 2005-2006 Cyrille Berger <[email protected]>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
require "krosschalkcore"
doc = Krosschalkcore::get("ChalkDocument")
script = Krosschalkcore::get("ChalkScript")
image = doc.getImage()
layer = image.getActivePaintLayer()
if(layer.colorSpaceId() != "RGBA" )
raise("This script works only for 8bit RGBA layers")
end
width = layer.getWidth()
height = layer.getHeight()
script.setProgressTotalSteps(width * height)
layer.beginPainting("invert")
it = layer.createRectIterator( 0, 0, width, height )
while (it.isDone() == 0)
p = it.getRGBA()
p[0] = 255 - p[0]
p[1] = 255 - p[1]
p[2] = 255 - p[2]
it.setRGBA(p)
script.incProgress()
it.next()
end
layer.endPainting()
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